Carbureter.



- i 4 kApplicationiileaiseeeamer12, i913. seia11vo-soaps91 Carlini-eters, specification.

, as to insure thorough earburization and p'rea vent excessive feedingof fuel tothe engine.`

tion ol a lnmlifieation:

l5-'elevation"of 11' portionv o1r the niodilieation i upper part 2 haring u throttle valve ythe engine, and also l RAMON or NEVWYORK. 'y

,To alzi whom tf/nay oonoemf y, l

1 i v Be 1t known that I, FREDERICK R. EUN-` erinnert,l a `citizen of the United States, and

afreeident of Grantwood, in the county-of Bepgenvand Sta-te of NewYA Jersey,have 1n- 'vented 'a f new and useful'. Ixnprovement;` in of rwlnehthe followingis ai;

Myv invention relates to;earloureters for internal combustion Another object of the invention-is to `pro#y vide a carbureter in which thellow of fluid fuel for a given setting ofthefthrottlevalveis Vautomatically regulated in Such manner My invention initq preferred form, provides floating regulating valves which regu-` late the flow of hydrocarbon tuel nnxture to hydrocarbon and auxiliary/'air into the pas-V sagewayfor eondueting fuelmiXture to the engine,l by varying fthe effective auxiliary 1111` and nozzle openings areording` to the positionsthat the regulating valves assume.

.The invention will the invention will more fully l1ppeardro1n the following description taken in eonneei tion with the-aeei)n'ipanyingrdrawings illus rtratingi" the preferred embodiments of `the invention, :1nd 1n \`\'lnoh-' kFigure l 1s a seetionzilelevation of oneV`V`r` torinof carburetor embodying 'they invention: lgt L), is airfel'evn'tionofthe saine taken at Vrigrh-t angles to Fig.v '1,'11nd`with f eertain parts insertion: Fig. 3 is-fa ycross seetionalview taken online B-3 ofp'lfig'. 1'; Fig. l is a (arose `eeet-ional view taken `on line l-lol Fig'. l; Fig. 5 yis a seetiomil elevashown lin Fig. 5, taken `at right anglestothe view of Fig'. andiwitlneertain pziitsfin@ section.

Referring tothe drawings, Figs. 'l to 15H1 is'tlie niain'or outer shell of the Carburetor, Consisting of two separate ,parte and-3, the

mounted in its upper endend having its lower end vexpanded to -torn'i 'the upper half of :1 nnxlng chamber ythe lower half of or? GRANTWOQD,

CARBUBETER;

i Speciicatt-ionjof Letters Patent.

y engiiiesi'and the general object of the lnvention'is to provide a com` w pac@ durable and eflieienty carburetor. i l

regulate 1 the How knurledwhead 17.

be more readilyv 11nder' `stood and further objects and advantages ot' the individual and eon'ihmed elements ,ot

the nozzle'openings so as How off'zur past these ropelnngsfjThe wallsv tion between the i wny QG formed by the amlFig. v(3 isza side.

x l et resented api.L 4, 191e Tvfliichis fornieclby the' expanded upper pory(31011"6 Aofthe lower part Bof the mainshell,

A, NEW LTERSEY, ASSIGNOR To `SUNDER- n y y 13, ooRPORATioNi yor NEWBURGH, NEW YORK, A CORPO* f Whiletlieportio'nr 7 offtli'e`lower partei.- the 1 `fshell below this expanded portion `is ttlbnlar "1nform, and :is provided at its` lower end with; a closure 'cap 8 re1n'orably thread-ed thereonl Thetnbularportion`7 of1theonter l shell is provided at its lower endjvwithnn air inlet'port 9, and' is 'provided approxr Inately mido-'ely ofitsy length; with vauxiliary air inlet `ports 10;vr The lovverend of the piecer -11 which is suitably cored out to' forni a looreA org passage l2 for y.eonveyin g hydrol carbon fneltosa nozzle 13k proJec'ting up-`r wnrdly c within the venientf The ooi-edout passager l2 is provalveI 15A which threaded andl suitably packed in the pifojeeting outer end' `16 of the andy 'is operated. by the cross-piece i 1l',

The n'ozzlel is providedv at its upper end with two,nozzleopenings 18 controlled 'by l ;1dapted'to`:olo`se rthe nozzle 'at the 'juncture fof Athese` two branch openings, and yis controlled ,in a manner 'he'relnafter described.` `Within the inner shell therefis provided a tiihulaifshell is also `provided with a eross-` oarbureter.- This cored` e out cross-piece may or V'mayfnot be formed;L integrallfas shown, with the, tubular exn tensiongotthe shell, as'lmay'be most oon-vk 4' 75 i' lvided with apartition 14l bored through to vfoi-'1n a valve-'seatcontrolled by a needle a hall valve 19 whichy is l' secondehell 20 having an upwardly andik u'ardly tapering noting 1n` al tubular portion 22 of` relatively restricted erosseeetional ofjthe tubular portion 22nd-the inner yshell 2O are cutaway nt'Q to permit Acommunica- .inner passageway E25` .90 'area surrounding ogcause a rapid within the inner shell :1nd the 'outer-1"passagel vadjacentr walls of the inneraind` oute'rshells. f Theinnershell 20 Vl'iaeforined'at its botportion 27 forming a sl'idin lit ywith the inner wall vof "the'outer Shell l, whil ,gabove`this flange portion and approximately opposite the an'xllialyair inf ports,` the inner 'shell isfprovided with' a,

short Seel' not a cylinder 30,Connectedto"rv the shellfQO 1.1i any suitable mnner such a.

the outer shell 7 'and by a Series `vot radial webs 31. This shortu Cylindrical section 3Q alsojhasa slidingtx with the inner wallsk of serves a movable valve part to control the ell ive opening of the :nixiliary air inlet ports lll. The upper end of the inner slidingm shell .20 provided with an annular head or dish 32 which may be `formed inte grally therewith, as shown, and having its circumference ground to tit an annular seat 33 formed at the base of the mixing chamber so as to shut oil' emnmunication betueen the mixing chamber and the lower end of the passageway when it is seated. The head 32 is provided with an opening the Walls of which are preferably tapered and ground to Jforni a` valve seat 3l upon which a movable valve part adapted to seat. This openen 1s ing is preferably formed concentric with respect to the head dish 32 and theinner shell 2&2, and of approximately the same diameter as the diameter ot' the inner shell 22 at this point; but there may be one or more openings in the disk at this point, in the place of one main opening, as hereinafter described with reference to the other modification of my invention. In the present form of my invention now being described,this opening in the head disk 32, as stated, is adapted to l be controlled by the movable valve part 35 A'from which extends a rod B6 passing through the top of the nozzle tube so as to engage the y ball 19, the length of the rod 3G heilig such that when the valve disk 35 is seated, the rod 36 holds the ball 19 down upon its seat at the Iiuncture of the nozzle openings to posiu tively shut` oil the flow of hydrocarbon 'through the nozzle; and to permit the oliective nozzle opening to be varied according to the lift oi valve disk 35 responsive to suclill dit

tion in the engine, in such manner that the ellbctvo opening of the nozzle is regulated .responsive to the mov ements of this valve part 35. The rod 36 is provided with a nut 3T between which and the upper end of the nozzle tube there is secured a retractile spring 38 tending to hold the rod 36 down upon the ball so that as soon `as the suction ot the engine ceases the balllwis forced firmly on its seat to shut olf theflovv of hydrocarbon through the nozzle. Y

The main valve disk 32 provided ,with some suitable means, such as the annular rib all having a lateral annular flange 40 for preventing the valve part 35 from, by any possibility, being displaced from its operative position or from being drawn to an unnecessary height above its valve seat.

A suitably perforated mixing and ballleplate 41 is scoured in place between the tivo parts ot the main shell, which are in turn held together by any suitable means such as bolts 42.

It will be seen from the above description that the inner shell :2O carrying the valvecontrolling cylindrical section 30 and the head `lisltl, is adapted freely toslide up and delvn within the outer tubular shell 7 in andere response to suction ,from the engine, and that, as this shell with its dillereiit parts is lifted upward, the auxiliary aizxinlet ports lll are uncovered in such manner that the effective opening of these ports is varied by the more ment ot' the inner shell responsive to suction.

The operation of the embodiment of the invehtion just described is as follows: In starting up the engine, the throttle valve is opened to a suitable extent and the engine is turned over to start it, the slight suction thus produced for starting being sullicient to lift the inner ialve disk 35 and the rod 36, thus allowing the suction to draw air through port i) into inner passageway 25 past the hydrocarbon nozzle openings, and to draw hydrocarbon through these openings, and draw the mixture ot' air and hydrocarbon past the valve disk 215 into thc mixing chamber. As the engine speeds up to increase the suction, the inner sliding shell 20 is lifted due to the suction on the upper head disk 32, thereby permitting more or less of the flow of the fuel mixture from the inner passageway 25 through the ports 234 into the outer passageway 26 and past the main disk valve 32 into the chamber; and at the same time the cylindrical section 30 controlling the inlet air ports is lifted to uncover these ports and permit the lflow of auxiliary air through the ports into the passageway 2() where it intermingles with the hydrocarbon mixture and passes on to the mixing chamber, the opening ot' the ports varying with the opening of the main valve disk 32.- As the engine speeds up, increasing the suction, the main valve disk with the inner shell and attached parts, is gradually lifted to a pointwhere the liovv of fluid fuel through the different air ports and the nozzle balances the suction to an extent to check the upward movement. It will thus be seen that the valve disks and 35 constitute floating regulating valvemembers responsive to suction in the engine for controlling the flow of lluid fuel to the mixing lchamber, and that the inner valve disk` 35 is opened responsive to less suction than the main valvedislt to enable the engine to be more readily started, to operate smoother at lower speeds, and to provide a more elastic opera tion than if but one valve disk were used. It will also be observed that the effective opening of Vthe auxiliary air port is directly controlled by the movement of thefmain regulating valve. If for certain forms of engines it is desirable to lift the main regulating valve 32 any desired distance before auxiliary-air is admitted, this may be done by suitably proportioning the extension ot the cylindrical valve-controlling section 30 below theopening of the auxiliary air ports l0.

In` certain aspects, in so far as certain features of the invention are concerned, and with respect. to the embodiment `just describe-d, the -pas'sage'waypfor the hydrocarbon 'hiel inixture,'as yhereinafter referred to in Y the claims, 'maybe regarded aeveith'efr cointhe inixiiigwohainber and a :single: lower extension `corresponding` to passage` j lway Communicating 4with fthe .inixing y `r valve disk` 32 in which threahled a rsleeve i' prising chamber through theA opening controlled by regniating Valvey 35,]oi" Comprising the mixing chamber'and the inner ,passage,wayf` ooinnianicating with the mixing rcliani'ber 1 through `the ports 23 andthe openingron;

trollecl by mainr dink rvrevulatine'valve i P" h controlled valve f The embodiment ofthe inventions above described is what isknown ae af fioatless l oarbiireteignamely, a carburetor infivliicli' there is no hydrocarbon tankf with"y a float-1 governing they supply of i fioat-coii embodi- 1 nient of the intention, since the'v ball 19 will" hydrocarbon to thenozzle. No trolled Valve'is necessary in this act to 'ont 'oi'uthe supply ofl "hydrocarbon immediately that the engine is`sh1i`t. down, ln the iiiodiioationfof fthe invention Shownfiii liigaiiand 6, the main outer'hell l in of the saine general Shape and Construcnon as that previouslydescribed',tlieflowei tuhiiiar end ofthe vshelly V7 being` provided kae .elli

has an upwardly Vin $ l nozzle, and

f of the invention,

ythe renti-acted portion of with auxiliary yair )Orts l0" and bein r also 'provided 4 with' a cross-piece 1p1` suit'al'ily' y cored ont toforn'i a-bor'e or passageway A12 y for the fiow off-hydrocarbon fuel. The air,A inlet o .lower/end or rim A5110iy the tubular extension and the edge oan inverteli,bell#Sliapedjrapr secured tothe -inain Shelly in siioliinianner` as to provide this suitable annular opening, f and which alsov Serves the'purpose 4cap to catch anyl lescaping;` gasoleneandf keep yextends vupfr 'ofa drip and the .fiow'of hydrocarbon til'iiougih the saine is controlled by va needlevalve'l l5 jwhich may he 'operated diieotlydby` the:

hnurled head 17forl through,suitable conneetifngi mechanism. "A` Second nozzle tube` (SO yis also4 provided extending upfronrtlie hydrocarbon passageway( 12', fthe' flow r`:of 'Y hydrocarbon tlirongli this tube being iegu-` ,lated by the inoreinent of disk SQLas herei-` inafteideserilnnl. e in this torni'fof 'the invention the sliiilingvinncr Shell 2O is replaewl bj a ,stationary-r inner Shell 20nee11red to the-outer shell by a set Scre'w (-l, 'This ShelL is inthe foi-mot a;doulileeone;that ia, it

part The .positiono thisiuuerishell 20 Within theoiiter shell isiso adjusted that at the' tip oi' the nozlle. y 'l`his` `inner-shell providers; a in airway 251ft'oiconveying air through. t

f ling the `admission of pening for service air, in thia'forni n -consists 'of an ,annularr n opening 'x50 formed between .the extreme i515' and inwardly .lopiiiglr pa rt 53 and an outwardly and i'rpwardlynarnia.

,the innerv shell is air inlet openingo up past the oeeause oi its: restricted area at The innerjwall of the main Sh ell 1 oi.y the mixing Chamber" is suit'- ,fwhicl'n extends downwardly' inl sliding engagement vwithl the inner walls` off'` the '75' shell 17. 'The lowerfend ofy this sleeveconstitutes a movable valve part for control the air vports 1 l0", :thusfseriing the` same isection in'` the previouslydescribed modification of tlieinvention. Tliissleeveis prov ruledy near its upper end with oiYe (oruinore kflow of Huidfuel through these portato the finixing chamber when the valve clislr`32and the attached sleeve are lifted so thatjthese function as 'the cylindrical .ralveecontrolling auxiliaryfair through 7 r'ports 5G forjtheipurpozfse of permitting the?` 1 portsclear the flower edge off-the valveeeat j 33. The desired vrelation between theunthe` location of these ports in the isle/eye w th y respectto the lengtlrofthe sleeve below 1 lhe vlower e-id of the auxiliary air @ports il f 'and'inv the embodimenty of i the l invent on g;

a shownfthe rrelative location of :thev part auch that the ports 56are uncovered ina1A of the ports .10".k

32 provided with one-ordnere openings 34? through which rthe passage ofI Huid yuel is controlled by a Sec'oi'id Ivali'c disk 35 adapted toslide rip/and downen the Shank of `aScrewvl 57'Soeur-edy `in the inain 'valve diskif, the hcadf58 of the "rewserfving as? 'a stopfor the valve dink i. lvalve disk 32 `59 threaded yinto, the disk iant down'iiito engagement with a eat ytorniedin the upperend ofthe nozzle tube (Si). sogjtliat when the disk 327 l`eated the' y y y59 is yalso seated tok sluit o'fi'ffthe honi 5 of liydroearlxni throughthisy nozzle.v ,'lhisw lary ror i nozzlehl) sei-rhs tofprovide an auxil inldi`-tiornilfy source of li'ydrocarbonfivhen the iengine has reached siifiirieiitfspeed theyralre 2-32, The carburetor shown ijnithis embodimentof the invention is 'a ihiattypc of cai-.'bureter Since `thehoat is neceSSary fto hydroraighonfn,tnely j through the nozzle 13 when the engine rshut down.. 1

ln `the nso of thisyniodiligation ot thefinj i i251 the y n SOLand, through theg inner pas-f sage'ivayfi .past the fnoi/,zler opening, and` to reiitiongjas the engine is. started fup tlie. Small floating valvejdisk iffis' lifted h y r suction of the engineTdi-awinog air thi the eiennii draw hydrocarbon from the nozzle; they inixcovering` ofthese' porta to admit ytliefiiid.. 90, 1

e 1li-' stantially` simultaneously#with thekuiioorcrf 'Theinain valve disk` ,v The main alsofcariies a iieellerva ljre rod extending f ieedle ral ref..

to "lift riet -spot-als up and the suction is increased, the

main valve disir Bil with the attached sleeve 55 is lifted, ui'ui'overiug ports 5G and l0 so as to admit auxiliary air tothe passageway and to admit' an additional iiow of fluid tuel to the mixing chamber, the upward increment ot' the valve disk and sleeve continuing until the inflow of fuel iiuid balances the suction suiiiciently to check the upward movement oi the parts.

W'hile I have described in detail the preferred embodiments of my inventionwit will be obvious to those skilled in the art that various changes and modifications therein may be made without departing romthe spirit and scope oi my invention, and I d not wish to be understood as limiting mysponsive to suction, but` responsive to self other than as indicated in theappended claims.

Having thus described my invention, what I claim as' new and desire to secure by Letters Patent, is:

l. In a carburetor, the combination of a passageway for fuel mixture having a restricted portion for receiving primary air and hydrocarbon forming a rich mixture therein, a stationary casing of larger di ameter than the restricted passageway and having primary and auxiliary air inlets, and a member slidably mounted therein and' forming a passageway therewith and operated responsive to suction, said member having a part controlling the direct iiow of auxiliary air from said last-named passageway to the rich mixture flowing from the restricted passageway and a part controlling said auxiliary air inlet.

2. In a carbureter, the combination of a passageway for hydrocarbon fuel mixture supplied with primary air and hydrocarbon and having a constantly open auxiliary air inlet, a reciprocating member, and a stationary cylindrical frame serving as a guidefor said member, said member being operated responsive to suction and guided in its movements by said frame and having a pa` serving as a movable valve member to otiti-m trol the {iow ol auxiliary air to said auxiliary air inlet in said passageway whereby the. flow of auxiliary `air is automatically regulated according to the position of said member. i

3. In a carburetor, the combination' of a passageway for hydrocarbon fuel mixture having a lower tubular portion of restricted cross-sectional area, an auxiliary air inlet into said tubular portion, said tubular portion receiving primary air at its lower end, a nozzle for supplying hydrocarbon extending into said restricted portion of the` passageway, a sliding member within the carbureter operated responsive to suction, and a guide for holding said sliding member in having an air inlet owning thereto, moulu-j ior delivering hydro farben to the passage way, a valve in the passageway operated re sponsive to suction for regulating the lion of hydrocarbon fuel, mixture lo tbc cugini` said valve having au opening therein, airi a second valve mounted on the iirst vali` to close said opening and also operated rr suction than the iirst valve so as to be opi erated before the first valve and having provision for regulating the fiow of hydrocarbon to the passageway.

5. In a carburetor, the combination ol" a passageway for hydrocarbon fuel mixture having an air inlet opening thereto, a nozzle within the passageway for delivering hydrocarbon fuel thereto, two valves in the passageway above the nozzle and air' opening, one a mam valve having an opening therein and the other asmaller valve mounted on the main valve to close said opening, each valve being operated responsive to suction for regulating the flow of fuel mixture to an engine, the smaller valve being responsive to less suction than the other and movable independently thereof, for admitting the mixture to the epgine at low'speeds, the larger-waive admitting the mixture at higher speeds, a valve operatively related to the nozzle for controlling the flow Aoyhydrocarbon fuel to the passageway, and means connecting said nozzle valve with the smaller regulating valve, 4whereby the nozzle is partly opened by the independent movement of said smaller regulating valve. r 6. In a carbureter, the combination of two assageways for fluid fuel, one having a portion of relatively restricted cross sectional `area and provided at its lower end with an air inlet `opening,the other passageway having an opening for auxiliaryV air, a nozzle extending within the restricted portieri ol" the first passageway for discharging hydro carbon fuel therein, and regulating valvca one at' the top ofV each passageway operated responsive to suction for controllingl the iiow of fluid fuel from the passageway to :men-- gine, the valve at the top of the restricted passageway being responsive to less suction than is `required to operate the other regulating valve, and being-operatively related to the nozzle for controlling the flow of hy-v droearbon from the nozzle responsive to the movement of said first valve.

7. 1n acarbureter,v the combination of an inner cylindricalshell forming a passageway of relatively restricted cross sectioiialvlaea with an air inlet opening' at its lower lenel, a nozzle extending within said passageway for deliveringhydrocarbon fuel thereto, a cylindrical shell arranged around the inner shell 'and forming with the Walls thereof a second passageway for 'auxiliary air, the outer shell having an air inlet opening therein, and regulating valves arranged above the passageways and operated responsive to' suction for controlling the` flow of fluid fuel from the passageways to an engine, one of the valves being responsive to less suction' .than is required to operate the other regu.-

' lating valve and being operatively related tothe nozzle `for varying the flow of hydrocarbonfrom the nozzle according to the position of said first fvalve.` l

8. -Ina carbureter, the combination of -a passageway for hydrocarbon fuel mixture having an air inlet .opening thereto .and an auxiliary air inlet opening, means for deiiv.

ering hydrocarbon fuel to the Passageway5 a valve part operatively related to the auxiliary air inlet opening for varying the amount of air admitted through thel same,

a regulating valve in the passageway oper` y ated responsive to suction for regulating the flow of hydrocarbon fuel mixtureithrough 4o livering hydrocarbon fuel to the Apassage,- .ivay, a valve operatively related to the auxiltional area and provided at 'its lower end` the passageway to an engine, and means operatively' connecting said regulating valve and auxiliary air valve part to`automatically regulate the auxiliary air opening by the movements of the; regulating valve.

9, In a carbureter, the combination of a passageway for hydrocarbon fuel mixture having an air inlet opening thereto and an auxiliary air inlet opening, means for deiary Vair inlet opening for varying the amount of air admitted through the same,

and two valves in the passageway above `the air openings and hydrocarbon 'delivering means, each valve operated responsive to suction for regulating the flow of fluid fuel to an engine, one vof the valves l'ieingresponsivefto less suction than the other and being oper-l atively related `to' the hydrocarbon deliverto the auxiliary air opening for varying the amount of air through the same, and regulating valves, one'at the top of each passageway operatediresponsive to suction for controlling the flow of fluid fuel from the passageways to anfenginc, tlie'valv'e at the 'to'p of the restricted .passageway being ref sponsive to less suction than the second reg- Iinner cylindrical shell forming a passageway of. relatively restricted cross sectional area cylindrical shell concentrically arranged around. the inner shell and forming with thev walls of the inn'er shell a second passageway for auxiliary air', the outer concentric shell having an air inlet 'opening therein; an auxiliary air valve operatively related to the openingfor varying `the amount of air ad-` mitted through the same, a nozzle for de-` livering hydrocarbon within they first passageway, and regulating valves concentrically arranged one at the top of each .passageway operated responsive to suction for controlling the flow of fluid fuel fromthe passagewaystoan engine, the valve atthe` top of the restricted passageway* being reing means for controlling the iow of hydro-E carbon through said means, the second regulatingv valve being operatively related to the auxiliary air yalve for automatically reg-y ulating the auxiliary air opening by the.

movement of ,said second regulatingvalve.

l0. lna carbureter, the 'combination of ltwo passageways for fluid fuel, one having a portion of relatively restricted crosssecwith an air inlet opening, the other passageway having au opening foivauxiliaryair, a

nozzle for delivering hydrocarbon Within' the first passageway, a valve'operatively related sponsive to less suction than the second regulating valve and beingoperatively relatedto the nozzle for controlling the iioiv of hydrocarbon` fuel therefrom responsivewto thev movements of the said first regulating valve,

'and the second regulating valve being operatively related to the auxiliary air valve for automatically regulating the auxiliary air. opening by they movement of said second l valve. y p vl2. In a carbureter, the combination of I assafrewa for hdrocarbon fuel mixture P e having an'airinlet opening' thereto, meansl sageway, a regulating -valve in the passage- Way operated responsive to suction and having an 'opening therein providing a valve senat,` and a second valve operatively related Athereto and also operated responsive to sucfor delivering hydrocarbon fuel to the pas- *'115 tion, but responsive to lesssuctionl than the n f first valve,- said valves seivingto regulate the flow of hydrocarbon fuel mixture to the', engine. t y 13.v In a carbureter, the combination of a passageway for hydrocarbon fuel mixture having `an 'air inlet opening thereto and an auxiliary air inlet opening, means for deliverv. ing'hydrooarbon to the passageway, a regirr4 lating valve operatively related to the auxil- 85 with an air inlet opening at its lower end, a

(iti

dit

iary air inlet opening and operated responsive to suction for automatically regulating the flou' of auxiliary air to the passageway, said 'aire havinga port therethrough, and a seco nd regulating; valve operatively related .to said port and movable independently oi' said lirst valve for controlling the lio-W of liuid fuel to the engine, and also operated responsive to suction, but responsive to less suction than is required to operate the first rei dating valves, said second regulating va tienner operatively related to the hydrori 'bon delivering means 'tor automatically controlling by its movements the flow o1" h vdrocarbon through said means.

14. ln a. ci'irbureter, the eoihbination olf a cylindrical shell having one or more openinffs therein for auxiliary air, an inner cylindrical shell forming a passageway ot relative-ly restricted cross sectional areal and forming with the walls of the outer shell a second passageway, said inner shell bein slidingly mounted within the outer shell to operate responsive to suction and having an annui-ar flange at` its upper a valve member for controlling the flow -of fluid fuel through the second passageway by the movements of the inner shell, said inner shell also having' a part movable thereuith and operatively related to the auxiliary air opiming to control the admission oi air theretln'ougrh according:r to the positifni of the inner shell, a nozzle for discharging hydrocarbon fuel Within the inner shell. and a second regulating valve mounted at the upper end ot the inner shell and responsive to suction for controlling;a the filouv of fluid fuel therethrough, but resi'ionsive to less suction than required to lii't the shell, said last valve `being:r operatively related to the nozzle to close the saine and to control the flow of hydrocarbon therefrom.

15. In a. carburetor, the combination oit a passageway for hydrocarlmn i'uol mixture having primary air and also yauxiliary air inlet openings tlieret means for delivering hydrocarbon il'nrl to ihn i'iassagreivay, and a regulating valve in the 1 ...5sageu'uy above said. hydrocarbon deliverinj;r nicnus and air openings operated responsive to suction for regulating the lion' ol hydroiifarbon.tuoi ininture to anena'ine, and having a part operatively related to the auxiliary air openings for controlling tl i admission of auxiliary air according to the position of the regulating valve.

lli. In a carburetor, the

combinationI of a cylindrical shell harias one or more. openings in its wall for admitting auxiliary air. and having provision at its lower `end for admitting primary a' `a nozzle extending Within the rylindi hell above the primaryv air opening tor supplying hydrocarboin and a sliding lloating valve above said air openingsnnd nozzle operated responsive more inlet openings in end providing f delivering hydrocarbon fuel to the ling the liow of fuel mixture to an engine.

invente ing apart operated therewith .for controlling the 'admission of air through the auxiliary air openings. i

17. In a carburetor, the combination ot. an inner shell forming a passageway having; a portion ot relatively restricted cross tional area with an air inlet opening at 'its lower end, ineens tor delivering hydrocarbon fuel at the restricted portion oit' the passageway, a second cylindrical shell arranged around said inner shell and havinv. one only its side Wall for auxiliary air, and a sliding floating valve above said air openings and hydrocarbon deliveringmeans operated responsive to suction for regulating the flow of hydrocarbon fuel mixture to `an engine, and having la part extending therefrom and slidablyengaging the inner "wall of the cylindrical shell adjacent said auxiliary air opening or openings for controlling the admission 4of air through said openings according to the position of theregulating valve. j

18. In a carburetor, the combinztion of an inner shell forming a passageway of relatively .restricted cross sectional area with an air inlet opening at its lower end, means for passageway, a second shell arranged around said inner shell and .having one or more inlet openings in its Wall for auxiliary air, mov- .able means at said openings adapted when operated to open andclose the same to vary the admission of auxiliar f air, and a regulating valve above said nozzle and air openings connected with said movableaneans and operated responsive to suction for control- 19. In a carburetenthe combination of a passageway for hydrocarbon :fuel mixture haring service` air and auxiliary air inlet openings thereto, and meansl for delivering hydrocarbon fuel to the passageway, regulating valve mechanism in the passageway above said hydrocarbon delivering ineens and air openings 4for regulating the flow ot hydrocarbon `fuel mixture to an engine, coin-- prision a main valve operated responsive to suction and having one or more openings therethrough, with a second valve operatively related thereto for controlling the flow of mixture ih starting the engine and responsive to less suction than the nmin 12' lll Tvalve, and a part operatori with said alain amount of air admitted througnthe same,

.and two valves in the passageway above the' air ,ppeninlgs and hydrocarbon delivering means, eac

to an engine, one ofthe valves being res onsivc to less suction Vthan the other,'and t e secondA regulating valve being opera- Y tively related to the auxiliary air valve for automatically regulating the auxiliary air openin by the `movement of said second regulating valve.

` 2l. In a carbureter, .the combination of an inner cylindrical shell forming a passage- Way of relatively restricted vcross sectional area with an air inlet opening atits lower end, a ftubulgr shell arranged about the inner shell and forming with the Walls of the inner shell a second passageway for auxiliary air, the outer or tubular shell having an air inletopening therein, 'an auxiliary 'air valve part operatively related to the opening for varying the amount of air admitted through the same,'means for delivering hydrocarbon `within. the first passageway, andf regulating valves arranged above, the said rpassageways and operated responsive to suction for-controllingthe flou of iuid fuel from the passageways to an engine, one of said valves being responsive' to less suction than they other, and said other regulating valve being operatively/*related .to the auxiliary air vvalve for `automatically regulating'ithe auxiliary air valve operated' responsive tosuction for regulating the How of fluid fuel opening by the movement of said second Valve.- I

'22. Ina carbureter, the combination of a cylindrical shell having one or more openings therein for auxiliary air, an inner cylindrical shell forming a passageway of relatively'restricted crosssectional area and forming with the walls of the outer shell a f second passageway, said inner shell being slidingly mounted within the outer shell to l' operate responsive to suction and having a partat its upper end providing a vvalve member for controlling the flow of fluid fuel throughtlie second passageway by the movements of the inner shell, said inner shell also liaving'a. part movable therewith and o pe1a,`

.. In testimony whereof, I have signed myv name to this specification, in the presence of two subscribing witnesses.

FREDERICK n. SUNDERMAN. y

Witnesses: y y

SAMUEL M. Wann,Y

r-w EDWIN SEGER. 

